user
Task: Generate a list of the important people involved in this article.

CNN's consultant on political television advertising believes that the cost to influence the 2008 election may exceed $3 billion.


assistant
- Evan Tracey, Chief Operating Officer at TNS Media Intelligence/Campaign Media Analysis Group
- Mitt Romney
- Rudy Giuliani
- Barack Obama
- Hillary Clinton
- Bill Richardson
- Mark Foley
- Stuart Rothenberg (Editor of the non-partisan Rothenberg Political Report).